121603477272 has 128 divisors (see below), whose sum is σ = 311951347200. Its totient is φ = 39491020800.

The previous prime is 121603477267. The next prime is 121603477273. The reversal of 121603477272 is 272774306121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121603477273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120518304 + ... + 120519312.

It is an arithmetic number, because the mean of its divisors is an integer number (2437119900).

Almost surely, 2^121603477272 is an apocalyptic number.

121603477272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121603477272 is an abundant number, since it is smaller than the sum of its proper divisors (190347869928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121603477272 is a wasteful number, since it uses less digits than its factorization.

121603477272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 121603477272 in words is "one hundred twenty-one billion, six hundred three million, four hundred seventy-seven thousand, two hundred seventy-two".